db.getCollection(‘zhxHotelNotMatch‘).aggregate( {‘$group‘:{
‘_id‘: {‘字段名‘: ‘$字段名‘},
‘uniqueIds‘: {‘$addToSet‘: ‘$字段名‘},
‘count‘ : {‘$sum‘: 1}
}},
{‘$match‘: {
‘count‘: {‘$gt‘: 1}
}})
mongo查询重复数据
原文:https://www.cnblogs.com/gun-a/p/13559044.html